Chain-saw.



PATENTED MAR. 1,2, 1907.

A. M. GRANBERY.

CHAIN SAW. APPLIOATION FILED JUNE 21,1906.

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Collierville,

UNITED NsTATEs PATENT OFFICE.

ALBERT M. GRANBERY, OF COLLIERVILLE, TENNESSEE.

CHAIN-SAW.

Specification of Letters Patent.

ratented March 12, 1907.

Application filed June 21,1906. Serial No. 322.753-

.To all whom, it may concern.Y

Be it known that I, ALBERT M. GRANBERY, a citizen of the United States,residing at in the county of Shelby and State of Tennessee, haveinvented a new and useful Chain-Saw, of which the following is aspecification.

This invention relates to a sawing machine or mill of that type4 inwhich a chain saw is employed and is adapted to cut wood into kinda-ng,and the like 1n a uick and easy manner.

The inventionhas for one of its objects to provided a device of thischaracter that is` capable of being, manually or power driven and'is` ofsimple, inexpensive, `and compact construction, so as to be easilyoperated and transported from place to place. e

. A further object of the invention is the employment of a simple andimproved mechanism for driving the saw, while permitting at the sametime the latter to be fed.

Another object of the invention is to rovide guiding and driving .eansfor the c lain saw, including devices wher by the tension of the saw maybe adjusted. With these objectsin view and others, as

' will appear as the nature of the invention is better understood, theinvention comprises the various novel features of construction andarrangement of parts, which are herein-l after more fully described, andset forth with "particularity in the appended claims.

In, the accom anymg drawing, which illustrates one em odiment of theinvention, Figure 1 is a front elevation of the machine with portionsbroken away. Fig.` 2 is a side elevationviewed from the right in Fig. 1.Fig. 3 is a `horizontal section on line 3 3 of Fig. 1.` Figs. 4 to 6,inclusive, are detail views, drawn Qn an enlarged scale, of variousforms of the saw-links. Fig. 7 is a section showing the joint betweentwo links.

lCorresponding parts in `the several figures are indicated throughout bysimilar characters of reference.

Referring to the drawing, A represents the main supporting-frame of themachine, comprising a base-plate 1, two spaced and para lel u rights 3,and a top or cross bar 4. At one si e of the frame and at the upper endthereof is a' supplemental frame SB composed of an upright 5, bolted tothe adjacent standard 3 at its lower end and spaced apart therefrom by aspacer 6. The upper end ofthe upright 5 is secured to the end of thecrossbar 4, which is extended beyond the standard 13, to which theupright 5 is attached. Mounted adjacent the upper end of the frame A isa horizontal driving-shaft-7, mounted in laterally-extending bearings 8,arranged on the standards 3 and upright 5. At one end the driving-shaft7 is extended beyond the frame A and has keyed thereto a ily-wheel 9.The driving-shaft may be driven in any suitable manner, as by a motor orby hand. For'the latter urpose a crank-shaft 10, that is mounted in n)tal frame, is employed, the same being connected with the driving-shaftby a powermultiplying gearing comprising a gear-wheel 12 on thecrank-shaft and a pinion 13 on the earings 11 on the supplemenmaindriving-shaft 7. The shaft 10 is rowheel, 20 an guide sheave or w eel 21for the chain saw 22. The shaft 18 of the driving-wheel 20 is mounted atits ends in sliding blocks 23, that are guided in vertical ways 24,formed by Z-shaped angle-irons arranged along the sides of the standards3 of the main frame. By this means the saw-carrying frame is guidedvertically on the supporting- `frame A. In order to move thesaw-carrying frame vertically, a per endicular rack 26 is employed,which is gui ed in an opening (indicated at 27, Fig. 2) in the cross-bar4. The lower end of the rack is forked and mounted `on the shaft 18,whereby the rack is adapted to move with the frame C. Between the upperend of the rack and the frame C is a diagonal brace 28 ,which assists insupporting the weight of the `saw-carrying frame. Mounted in bearings 29on the top bar 4 is a rotary shaft 30, having a pinion 31 meshing withthe rack-bar 26 and a crank 32, whereby the shaft is rotated. By Vthismeans the saw`- carrying frame can be raised or lowered, so as to`adjust the saw to a log being cut up and also to feed the saw during thesawing operal tion.

lOO

To feed the saw and drive the same simultaneously, a sprocket isprovided on the shaft 18 at one side of the bifurcation of the leg'16,

as indicated at 33, Fig. 2, that meshes with a` l with the chain. Itwill thus ,be seen that the chain-saw will -be driven by rotating thecrank 14, irrespective of the height of the saw-carrying frame C. Byreference to Fig. 2 it will be noted that the driving and feeding cranks14 and 32 are located, preferably, on the same side of the main frameandat a convenient height, so that they can be operated simultaneouslyby the operator.

The chain saw is actuated by a positive drivingmeans, so that slip ofthe saw is im-v possible. For this purpose each link of the saw, orlinks at suitable intervals, are provided with slots 3.8, that areadapted to be engaged by ins or other devices 39 on the driving-whee 20,that act as teeth for imparting movement to the chain saw. The wheels 20and 21 are peripherally grooved to a substantial depth, so as to receivethe saw edgewise and maintain the latter in a vertical plane. They alsoinsure the saw'from slipping of. The tension on the saw is controlled bymeans of set-screws 40, eachv arranged in one of the bifurcations of therighthand leg 16 of the saw-carrying frame C Each bifurcation isprovided with parallel horizontally-extending jaws 41, between which isarranged a sliding block 42, in which the shaft 19 is mounted. Bymeans'of the set-screws 40 these blocks 42 can be moved to -the right orleft, and thereby adjust the tension on the saw. The links of the saw,as

shown in Fig. 7, are arranged with their ends v overlapping, theoverlappin portion being halved or shouldered, as indicated at 43, sothat the thickness at the joint of the links Willbe no reaterthanthebodyportion. Adjacent lin s are connected by countersunk rivets 44.In orderto prevent the lower half of the chain saw from sagging orbuckling upwardly incident to the feed ofthe saw, several differentmeans may be em loyed, which maintain the saw straight whi e passingthrough the wood, but permit it to read# ily plass around the wheels 20and 21. Thus, as s own in Fig. 4, the overlapping end of one link may beprovided with a segmental slot 45, in which Works a pin rigidly securedto' the overlapping portion of the adjacent link.

When the pm 1s at the bottom ofthe segmental slot, as shown in Fig. 4,the vsaw 'is prevented from buckling upwardly; but by rea son of theslot the band can readily pass around the wheels. The in 46 may be inthe form of a rivet that is rlveted in place, or it can be a lug 47,struck up at right an les from lthe link, as shown in Fig. 5. A urt eralternative form is shown in Fig. 6, the same com rising interlockingshoulders 48 on the over apping ortions of adjacent links, the links.being esignated by 49 in the several iigures.

The legs 16 of the saw-carrying frame are spaced at a suitable distanceapart, so as to embrace a log of substantial dimensions, and the member15 is arched, so as to provide sufficient ,clearance as well as to braceor strengthen the inverted-U-shaped structure. A log, as indicated at50, is placed under the frame C, with its length substantially parallelwith the plane of the main frame A, and the machine and log are held infixed relations by means of one or more dogs 51, pivoted to the standard3 at 52 and rovided with spurs 53, that are adapted to e driven into thesurface of the log, as shown. Fig. l illustrates the machine inoperation, the cranks 14 and 32 being turned in the directions indicatedby the arrow, so as to cause, through the intervening mechanisms, thechain saw 22 to move in the direction indicated by the arrows adjacentthereto and the saw-carrying frame to move downwardly.

The chain saw maybe provided with teeth of any desired character. Bypreference, how

drag or cleaning-tooth 55, as clearly shown in Figs. 4 to 6. y

From the foregoing description, taken in connection with theaccompanying drawing, the advantages of the construction and oftheoperation of the invention will be readily understood by those-skilledin the art to rwhich it appertains, and it will be readil lseen thatlogs of different diameters may e quickly and easily sawed.

I have described the principle of operation ofthe invention, togetherwith the'apparatus which I now consider to be the best embodimentthereof; but I. desire to have it understood that the a paratu's shownis merely illustrative, and t at various chan es may be made whendesired as are within t e scope of the invention. I

What is claimed is- 1. The combination of a main frame comprising spaceduprights, g'uideways on the uprights, a saw-carrying frame extendingoutwardly from between the uprights, a saw-actuating shaft mounted onthe latter frame, means on the shaft engaging in the 'guideways, a rackguided on the mam frame ICO saw-carrying frame and rack to support theouter end of the former.

2. The combination otv a main frame comprising a air of uprights,angle-irons on the uprights or formin guideways, a saw-carrying framearrange at righty angles to the main frame with 1ts outer end suspendedfree, a shaft on the saw-carryin frame for actuating the saw,bearing-bloc s for the ends of the shaft engagin(r in the guideways, averti` cally-disposed rac having its lower end connected with the saidshaft2 means on the u per end of the main frame guiding the racli, and abracing member betweenl the upper end of the rack and the outer portionof the saw-4 wardly at right angles to the plane inc uding the uprights,a driving-shaft on the main frame disposed with its axis at right anglesto the plane of the'saw-carrying frame, a sawdrivlng shaft onthe secondframe disposed parallel with"` the said driving-shaft, asprocket-andchain mechanism o n the main frame actuated -by thedriving-shaft, means for guiding the ,saw-carrying frame along theguideways, a sprocket on the saw-drlvin shaft permanentlymeshing withthe chain o the said'mechani'sm, and means for feeding the 4saw-carryingframe.

4'. The combination of a main frame comprising upri hts spacedapart andconnected at their en( s, a driving-shaft adjacent the Aupper end of theframe,y a crankshaft ar ranged at one side of the frame for actuatingthe ldriving-shaft, a shaft at'y the base of thc frame, sprockets on theshafts at points intermediate the uprights, a sprocket-chain extendingfrom one s rocket to the other and arranged with one alf extendingvertically, guides on the upri hts disposed arallel with the said halfof -t e sprocketc ain, an invertedf'U-shaped structure having its lowerends bifurcated, ,grooved Wheels arranged between the `bifurcations ofthe said structure, a chain saw `extending around the wheels, a sawdriving shaft journaled on one of thelbifurcated ends oi' the structure andbloc on the saw-driving shaft engaging in the guideways of the mainframe, a rack connected with the said structure, a pinion meshingtherewith, and a crank-shaft for actuating thev pinion supported on theupper end of the mam frame and having its crank carrigng' one of thegrooved wheels, bearingon the same side of the latter as the crank forthe driving-shaft.

5. The combination of a main frame comprising a base, spaced uprightsmounted thereon, and a cross-piece mounted on the luprights, with aVsaw-carrying frame eX- tending outwardly from, between theu rights, asawfactuating shaft mounted Qn t e latter frame, metal strips of angularcrosssection arranged on tne uprights and coperating therewith ltoformguideways, blocks on the ends of the shaft movable in the'guideways,a rack guided on-the main frame and connected with the saw-carryingframe,

means on the cross-piece for actuating the rack, and a bracing memberconnecting the saw-carrying frame andrack to support the outer end ofthe former.

6. The combination of a main frame, a t

horizontal driving-shaft mounted thereon, a {1y-wheel on the shaft, apower-multiplgfing gearing for transmitting motion to the riving-shaft,asprocket-and-chain device on the rame actuated by the driving-shaft,vertical guides on the frame, a saw-carrying frame movable on the mainframe, a wheel on the saw-carrying frame for driving the saw, a shaftfor the latter wheel, bearing-blocks on the ends of the shaftengaging inthe guides, a sprocket' connected with the wheel and arranged to bepermanentlyl 'in mesh with the chain of said device, and means forraising and lowering the saw-carrying frame.

7. The combination of anu rightrectangular frame, a vertical] -movablesaw-carrying frame extending om one side of the main frame and movableon the latter, a rack attached to the lowerfportion of thesaw-carrying.frame and guided on the main frame, a bracing memberconnected with the rack at its upper portionandwith the outer portion ofthe saw-carrying'frame1 a crankshaft mounted at the upper end of themain frame, a pinion on lthe vcrank-shaft meshing with the rack, adriving-,shaft below the crank-shaft, a sprocket-and-chain mechanism onthe mainframe arranged to receive motion from the driving-shaft, andmeans on the saw-carrying frame for receiving motion from the 'saidfmechanism and imparting it to thesaw. f v

In testimony that .I claim the foregoing as my own I have heretoa'fxedmy signature in the presenceof two witnesses;

v ALBERT M. GRANBERY Witnesses: i

J. F. Hons'ion,l J. M. Fanjrmj

